Have you got a ScanGauge already ?
I can send you mine, so you can see if it works or not.
If it works properly, you can use it for the eco rally .
I might even sell it to you as at the moment I'm not liking what I'm seeing.
Fuel consumption is going up and down wildly, while engine load on the SG and FC on the on board computer are pretty much stable.
UFO's suggestion to use a smaller engine displacement works to some degree, but the average seems to be very low (below 4L/100km - I'd love it if that were true
).